Right now

Temp15°C

Wind20 km/h

Gusts30 km/h

Humidity88.4%

Rain 48h0.3mm

Last rain3h ago

Assessment

0.3mm rain forecast

Windy — 27 km/h, gusts 0 km/h

High humidity (88.4%) — granite friction compromised, particularly for bouldering

Humidity 88.4% — potential fog/cloud, rock may be damp from condensation

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Wednesday 16 September

Poor

Temp16°C

Rain0.3mm

Wind27 km/h

Gusts30 km/h

Humidity80%

0.3mm rain forecastWindy — 27 km/h, gusts 0 km/h

Good conditions for granite
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

08:00 15° 0.3mm 20 — 88.4%

09:00 15° dry 18 — 83.7%

10:00 16° dry 20 — 81.9%

11:00 17° dry 23 — 77.8%

12:00 17° dry 29 — 78.4%

13:00 17° dry 31 — 81.1%

14:00 16° dry 30 — 82.1%

15:00 17° dry 28 — 80.4%

16:00 16° dry 29 — 79.5%

17:00 16° dry 29 — 82.9%

18:00 16° dry 27 — 80%

19:00 16° dry 27 — 80.1%

20:00 16° dry 31 — 79%

21:00 16° dry 35 — 79.3%

Thu Thursday 17 September

Caution

Temp16°C

Raindry

Wind33 km/h

Gusts—

Humidity75%

Should be dryWindy — 33 km/h, gusts 0 km/h

Good conditions for granite
Very windy — exposed routes will be unpleasant
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 26 — 73%

07:00 15° dry 31 — 73.5%

08:00 15° dry 30 — 77.9%

09:00 15° dry 33 — 66.9%

10:00 15° dry 32 — 62.5%

11:00 16° dry 32 — 66.7%

12:00 16° dry 34 — 72.8%

13:00 16° dry 35 — 80.9%

14:00 16° dry 37 — 82.1%

15:00 16° dry 32 — 80.4%

16:00 16° dry 28 — 82.9%

17:00 16° dry 27 — 79.1%

18:00 16° dry 28 — 79.5%

19:00 16° dry 30 — 81.4%

20:00 16° dry 33 — 82.6%

21:00 16° dry 33 — 82.2%

Fri Friday 18 September

Poor

Temp16°C

Rain4mm

Wind22 km/h

Gusts—

Humidity80%

4.3mm rain forecast

Good conditions for granite
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 15° 2mm 31 — 91.5%

07:00 15° 2mm 30 — 91.9%

08:00 15° 0.4mm 32 — 93.4%

09:00 16° dry 26 — 89.9%

10:00 16° dry 19 — 74.1%

11:00 17° dry 21 — 81.8%

12:00 17° dry 27 — 83.8%

18:00 16° dry 32 — 78.5%

Sat Saturday 19 September

Poor

Temp18°C

Rain0.4mm

Wind34 km/h

Gusts—

Humidity80%

0.4mm rain forecastWindy — 34 km/h, gusts 0 km/h

Good conditions for granite
Very windy — exposed routes will be unpleasant
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 15° dry 32 — 84.3%

12:00 18° dry 34 — 79.5%

18:00 17° 0.3mm 35 — 83.6%

Sun Sunday 20 September

Poor

Temp17°C

Rain1mm

Wind36 km/h

Gusts—

Humidity82%

1mm rain forecastWindy — 36 km/h, gusts 0 km/h

Good conditions for granite
Very windy — exposed routes will be unpleasant
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 16° 0.5mm 37 — 90.6%

12:00 17° dry 36 — 82.4%

18:00 15° dry 34 — 74.2%

Mon Monday 21 September

Caution

Temp17°C

Raindry

Wind34 km/h

Gusts—

Humidity68%

Should be dryWindy — 34 km/h, gusts 0 km/h

Good conditions for granite
Very windy — exposed routes will be unpleasant
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 37 — 78.5%

12:00 17° dry 34 — 68%

18:00 15° dry 31 — 73.8%

Tue Tuesday 22 September

Good

Temp16°C

Raindry

Wind17 km/h

Gusts—

Humidity72%

Should be dry

Good conditions for granite

Time °C Rain Wind (km/h) Gust Hum

06:00 13° dry 20 — 82.1%

12:00 16° dry 17 — 71.9%

18:00 15° dry 17 — 78.2%

Wed Wednesday 23 September

Good

Temp17°C

Raindry

Wind20 km/h

Gusts—

Humidity81%

Should be dry

Good conditions for granite

Time °C Rain Wind (km/h) Gust Hum

06:00 13° dry 18 — 84.7%

12:00 17° dry 20 — 81%

18:00 15° dry 19 — 78.5%

About Hammerknuden

Hammerknuden (also Hammeren — "hammerhead-shaped crag of granite") is the protected granite promontory at the northern tip of Bornholm, and the island's most popular climbing venue. The Danish Nature Agency officially recommends four climbing sites here — two at Lindesdal on the western face and two at Opalsøen near the old quarry lake. Rock is the same Precambrian Bornholm golden granite as Vang, but the promontory position gives fuller Baltic exposure. North-west aspect means the wall is in shade most of the day with evening light — good friction, cooler feel on warm summer days. Coastal flag applies for onshore-wind spray warnings. Weather shared with Vang via anchor.

Region: Bornholm
Rock type: Granite
Aspect: north-west-facing
Altitude: 40m
Exposure: high
Seepage: low

Other crags in this region

Vang